Frank Quarles has been charged as an adult; he's currently at the Palm Beach County Jail, WPBF 25 News has learned.

Michael Robertson, 16, was shot dead on Kewanee Road in Lantana last week. Classmates of the two told WPBF that the shooting stemmed from an argument over a bike, that the shooter was trying to prove his toughness.

Robertson's grandmother, Geraldine Robertson, also spoke to WPBF the day after the shooting and fought back tears while sharing harsh words.

"It was no accident," she said. "I want to kill him like he killed my grandson."

Robertson was shot in the chest, then ran home for help, but collapsed at the front door. He was rushed to a hospital, but died on the way there.

A Justice Department civil rights investigation has concluded that the Ferguson Police Department and the city's municipal court engaged in a "pattern and practice" of discrimination against African Americans, targeting them disproportionately for tr...